Revenue and Revenue Recognition (Details Narrative)	9 Months Ended
Feb. 28, 2021	Feb. 29, 2020
Canada and Mexico [Member]
Disaggregation of Revenue [Line Items]
Concentration risk percentage	0.80%	3.80%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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